Portable folding tub



FIG. 1 is a front elevation of a portable hot tub showing my new design, the back elevation being a mirror image;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation thereof; and,

FIG. 4 is a perspective view thereof.

The bottom of the portable folding tub is plain and unornamented. 

The ornamental design for a portable folding tub, as shown and described. 